<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
           
    </style>
</head>
   <div id="box">
    {{ msg}}
    {{isbeauty }}
    {{num}}
    {{ new Date() }}
    <button @click="show">{{ isbeauty?'美女':'丑八怪'}}</button>
   </div>
<body>
 
    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.13/dist/vue.js"></script>
    <script>
       var vm = new Vue({
           el:"#box",
           data:{
               msg:"你好",
               isbeauty:true,
               num:100
           },
           methods:{
                show(){
                    this.isbeauty=!this.isbeauty
               
                 return this.num=this.num+1
                }
           }
         
       })
      
    </script>
</body>
</html>